About the method of Yii Framework to obtain all subclasses under the category

This article mainly introduces the method of Yii Framework framework to obtain all subclasses under the classification. It has certain reference value. Now I share it with you. Friends in need can refer to it.

Yii is a A component-based, high-performance PHP framework for developing large-scale web applications. Yii has almost all the features, including MVC, DAO/ActiveRecord, I18N/L10N, caching, JQuery-based AJAX support, user authentication and role-based access control, scaffolding, input validation, widgets, events, theming, and web services etc.

Get all subcategories under the category:

static function getMenuTree($arrCat, $parent_id = 0, $level = 0,$all=True)
 {
  static $arrTree; //使用static代替global
  if(!$all) $arrTree ='';
  if( empty($arrCat)) return FALSE;
  $level++;
  if($level == 1) $arrTree[] = $parent_id;
  foreach($arrCat as $key => $value)
  {
   if($value['parent_cid' ] == $parent_id)
   {
    //$value[ 'level'] = $level;
    $arrTree[] = $value['cid'];
    unset($arrCat[$key]); //注销当前节点数据，减少已无用的遍历
    self::getMenuTree($arrCat, $value[ 'cid'], $level);
   }
  }
  return $arrTree;
 }

The prerequisite for using the above method is to write the category into the cache file. The method of writing cache files is as follows:

public function actionIndex2()
 {
 $filepath = Yii::getPathOfAlias('application').'/data/';
 $arr = array();
 $db = Yii::app()->db;
 $listinfo = $db->createCommand("select name,cid,parent_cid,root_cid from item_cat_info")->queryAll();
 foreach($listinfo as $val)
 {
   $arr[$val['cid']] = array('cid'=>$val['cid'],'name'=>$val['name'],'parent_cid'=>$val['parent_cid'],'root_cid'=>$val['root_cid']);
 }

 $applist = "<?php\nreturn ".var_export($arr, true).";\n?>";
 file_put_contents($filepath.&#39;itemcat.php&#39;, $applist);
  }

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